The GR1 is like one of those mythical objects that people on the internet talk about, but nobody you know actually has.
As the saying goes, though, you get what you pay for. In this price range, there is a lot of competition from other gear makers like Kifaru, Mystery Ranch, Crye Precision, London Bridge Trading, and more. All of these are considered top notch. Yet, when you search around the web, the GR1 consistently has loyal advocates.